Try trashing the prefs for PSE 2020 (v.18)
Quit Elements
Launch Finder and go to your Username >>Library >> Preferences
Send the following files/folders to the bin:
Adobe Photoshop Elements 18 Paths
Adobe Photoshop Elements 18 Settings
com.adobe.Elements Organizer.18.plist
com.adobe.PhotoshopElements.plist
The library is hidden in recent versions of Mac OS. To get to your user library quickly, from the top menu in Finder, click “Go” whilst holding down the Option (Alt) key and your user Library will appear for you to choose.
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